Surge Protector error--open ground

Maybe it is just a bad connection. Remove and plug in a few times.
Next check the outlet with a tester or multimeter.
Try a different outlet to verify the protector is working.

Post an update.

I've had my MH plugged in 24/7 for 10 years and occasionally my surge protector will show the "No Ground" error code but the MH has full power.

You indicate that it has been plugged in for 2 months. Did it show "No Ground" when you 1st plugged it in? Is the error code showing "No Ground" but is the power to you RV on now?

If both of the above are "yes" then there could have been a grid power outage sometime in the last 2 months caused by a lost ground which was corrected and your surge protector is just letting you know it happened.

Dave

While there can be a number causes of a bad ground connection, in the case of most "home" connections to a 15 amp connector, it is the adapter. Of course an extension cord with a missing ground pin would also cause the problem...

smpsmpsmp-
All the above advice is good, but before you go to a lot of trouble, try a quick test: Turn the breaker off, then scrub the plug in and out of the receptacle a few times. Sometimes the contacts (in this case the ground contact) in the receptacle get corroded and lose connection. That can happen with temperature changes. Then see if the code on you surge suppressor clears. If you have any adapter in the line, scrub those contacts also.

This is just a troubleshooting test - if it clears the problem you probably need to replace the receptacle for a permanent fix. Use a good quality receptacle.

Get one of these to help isolate problem. I would believe that is likely the adapter.
Circuit tester

Had the same code happen in an RV park last summer. It was caused by a defective outlet plug on the pedestal. The park replaced it while I waited and it checked out good.

If you can find a receptacle that has a known good ground, you could use an extension cord and see if there is continuity between the ground in the receptacle you're getting the fault on and the path to ground in the extension cord.
If continuity is observed, the surge guard device would then be suspect.

Most likely cause is there is no ground wire connection...:W

Probably the receptacle is wired incorrectly and/or incomplete. Pretty easy to do if you're not an electrician. You don't say whether your receptacle is 30 or 50 AMP service. 50AMP has two hots, a neutral and a ground.

To easily check, use a meter and probe one of the hots and connect the other to the ground. You should show 120V on each leg. If not your ground wire is missing/broken/cut or was never installed.

To better help us help you, provide the NEMA number on the receptacle.....Dennis

HERE is more info...D